I use an unarmed aspx at 60ly. full PD and two srv's. never needed the spare one, but its an awful long way back to get a new one if the fan gets hit by excrement.
On the modules one, ive completed all i need. In fact I have one extra. Its relatively simple and you soon get into a method. For me I go clockwise and scan obelisks for data first, wakes up a couple of sentinels, which I toast and scoop up their bits. Then I put srv on ball thing, to activate the pylons. and work from left to right, finally doing pylon by the orb and getting data, then zapping sentinels, then hoovering up sentinel bits. Oh, dont forget to pick up a relic.
Im off to do 12 runs at the weapons site next, I find that one is even easier.